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Subject[PATCH v2 3/4] drm/tinydrm: export mipi_dbi_buf_copy and mipi_dbi_spi_cmd_max_speed
Date
This exports the mipi_dbi_buf_copy() and mipi_dbi_spi_cmd_max_speed()
functions so that they can be shared with other drivers.

Signed-off-by: David Lechner <david@lechnology.com>
---

v2 changes:
* new patch in v2

drivers/gpu/drm/tinydrm/mipi-dbi.c | 24 ++++++++++++++++++++----
include/drm/tinydrm/mipi-dbi.h | 4 +++-
2 files changed, 23 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/tinydrm/mipi-dbi.c b/drivers/gpu/drm/tinydrm/mipi-dbi.c
index 347f9b2..aa6b6ce 100644
--- a/drivers/gpu/drm/tinydrm/mipi-dbi.c
+++ b/drivers/gpu/drm/tinydrm/mipi-dbi.c
@@ -154,8 +154,18 @@ int mipi_dbi_command_buf(struct mipi_dbi *mipi, u8 cmd, u8 *data, size_t len)
}
EXPORT_SYMBOL(mipi_dbi_command_buf);

-static int mipi_dbi_buf_copy(void *dst, struct drm_framebuffer *fb,
- struct drm_clip_rect *clip, bool swap)
+/**
+ * mipi_dbi_buf_copy - Copy a framebuffer, transforming it if necessary
+ * @dst: The destination buffer
+ * @fb: The source framebuffer
+ * @clip: Clipping rectangle of the area to be copied
+ * @swap: When true, swap MSB/LSB of 16-bit values
+ *
+ * Returns:
+ * Zero on success, negative error code on failure.
+ */
+int mipi_dbi_buf_copy(void *dst, struct drm_framebuffer *fb,
+ struct drm_clip_rect *clip, bool swap)
{
struct drm_gem_cma_object *cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
struct dma_buf_attachment *import_attach = cma_obj->base.import_attach;
@@ -192,6 +202,7 @@ static int mipi_dbi_buf_copy(void *dst, struct drm_framebuffer *fb,
DMA_FROM_DEVICE);
return ret;
}
+EXPORT_SYMBOL(mipi_dbi_buf_copy);

static int mipi_dbi_fb_dirty(struct drm_framebuffer *fb,
struct drm_file *file_priv,
@@ -444,18 +455,23 @@ EXPORT_SYMBOL(mipi_dbi_display_is_on);

#if IS_ENABLED(CONFIG_SPI)

-/*
+/**
+ * mipi_dbi_spi_cmd_max_speed - get the maximum SPI bus speed
+ * @spi: SPI device
+ * @len: The transfer buffer length.
+ *
* Many controllers have a max speed of 10MHz, but can be pushed way beyond
* that. Increase reliability by running pixel data at max speed and the rest
* at 10MHz, preventing transfer glitches from messing up the init settings.
*/
-static u32 mipi_dbi_spi_cmd_max_speed(struct spi_device *spi, size_t len)
+u32 mipi_dbi_spi_cmd_max_speed(struct spi_device *spi, size_t len)
{
if (len > 64)
return 0; /* use default */

return min_t(u32, 10000000, spi->max_speed_hz);
}
+EXPORT_SYMBOL(mipi_dbi_spi_cmd_max_speed);

/*
* MIPI DBI Type C Option 1
diff --git a/include/drm/tinydrm/mipi-dbi.h b/include/drm/tinydrm/mipi-dbi.h
index 83346dd..5d0e82b 100644
--- a/include/drm/tinydrm/mipi-dbi.h
+++ b/include/drm/tinydrm/mipi-dbi.h
@@ -72,10 +72,12 @@ void mipi_dbi_pipe_enable(struct drm_simple_display_pipe *pipe,
void mipi_dbi_pipe_disable(struct drm_simple_display_pipe *pipe);
void mipi_dbi_hw_reset(struct mipi_dbi *mipi);
bool mipi_dbi_display_is_on(struct mipi_dbi *mipi);
+u32 mipi_dbi_spi_cmd_max_speed(struct spi_device *spi, size_t len);

int mipi_dbi_command_read(struct mipi_dbi *mipi, u8 cmd, u8 *val);
int mipi_dbi_command_buf(struct mipi_dbi *mipi, u8 cmd, u8 *data, size_t len);
-
+int mipi_dbi_buf_copy(void *dst, struct drm_framebuffer *fb,
+ struct drm_clip_rect *clip, bool swap);
/**
* mipi_dbi_command - MIPI DCS command with optional parameter(s)
* @mipi: MIPI structure
--
2.7.4
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